Use UUIDs in group database schema

ts/util/normalizeUuid.ts

@@ -1,12 +1,12 @@
 // Copyright 2021 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
 
+import { isValidUuid } from '../types/UUID';
 import { assert } from './assert';
-import { isValidGuid } from './isValidGuid';
 
 export function normalizeUuid(uuid: string, context: string): string {
   assert(
-    isValidGuid(uuid),
+    isValidUuid(uuid),
     `Normalizing invalid uuid: ${uuid} in context "${context}"`
   );